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Library/boost/libs/smart_ptr/test/quick.cpp
80 строк
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PatoFlamejanteTV
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19 дек 2024, 19:11
19 дек 2024, 19:11
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// // quick.cpp - a quick (CI) test for Boost.SmartPtr // // Copyright 2017 Peter Dimov // // Distributed under the Boost Software License, Version 1.0. // // See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt // #include <boost/smart_ptr.hpp> #include <boost/core/lightweight_test.hpp> class X { private: X( X const & ); X & operator=( X const & ); public: static int instances; X() { ++instances; } ~X() { --instances; } }; int X::instances = 0; int main() { { boost::shared_ptr<X> p1( new X ); BOOST_TEST_EQ( X::instances, 1 ); BOOST_TEST_EQ( p1.use_count(), 1 ); boost::shared_ptr<X> p2( p1 ); BOOST_TEST_EQ( p2.use_count(), 2 ); boost::weak_ptr<X> wp( p1 ); BOOST_TEST_EQ( wp.use_count(), 2 ); p1.reset(); BOOST_TEST_EQ( wp.use_count(), 1 ); p2.reset(); BOOST_TEST_EQ( wp.use_count(), 0 ); BOOST_TEST_EQ( X::instances, 0 ); } { boost::shared_ptr<X> p1 = boost::make_shared<X>(); BOOST_TEST_EQ( X::instances, 1 ); BOOST_TEST_EQ( p1.use_count(), 1 ); boost::shared_ptr<X> p2( p1 ); BOOST_TEST_EQ( p2.use_count(), 2 ); boost::weak_ptr<X> wp( p1 ); BOOST_TEST_EQ( wp.use_count(), 2 ); p1.reset(); BOOST_TEST_EQ( wp.use_count(), 1 ); p2.reset(); BOOST_TEST_EQ( wp.use_count(), 0 ); BOOST_TEST_EQ( X::instances, 0 ); } return boost::report_errors(); }